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	<meta charset="UTF-8">
	<title>class list</title>
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	<h2>你要买什么课程？</h2>
	<p title='请您选择购买的课程'>本课程是web全栈课程，期待你的购买！</p>
	<ul id='classList'>
		<li class='item'>JavaScript</li>
		<li class='item'>css</li>
		<li>DOM</li>
	</ul>
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